1 [NEW!] Sports vocabulary : Words for popular American sports. [ 2 NEW!] Air Travel: Useful words for traveling on airplanes and through airports. 3  The Environment: Vocabulary related to environmental science and climate change.  Family members: Relatives and other important people.
diffusion coefficient see diffusion coefficient. coefficient of digestibility the proportion of a food that is digested compared to what is absorbed, expressed as a percentage. dilution coefficient a number that expresses the effectiveness of a disinfectant for a given organism.
The equation at the top of this page is Graham's Law of Diffusion, named after the Scottish chemist Thomas Graham (1805 - 1869). It states that the diffusion rate of a gas is inversely proportional to the square root of its molar mass (molecular weight). Stated in simpler terms, lighter gases (in terms of density or molecular weight) will diffuse faster than those gases with higher densities or molecular weight.